No. Or, at least, not necessarily; in 7/8 time, they would make a full measure.
three because two eighth notes equal one quarter note
Yes, they do.
I believe the quarter note equals 42, but I'm not really sure.
three because two eighth notes equal one quarter note
Putting a dot beside it. A dotted quarter note (crotchet) is equal to three eighth notes (quavers).
1, the definition of any triplet is two notes of one kind in the space of two of the same kind of note, so three eighth notes in the space of two. Two eighth notes equal ond quarter, so 1 quarter note.
A dotted quarter note is equal to 1.5 beats. Three quarter notes are 3 beats. Therefore, 3 quarter notes is equal to 2 dotted quarter notes.
three
A dotted eighth note is equal in duration to three sixteenth notes.
3 quarter notes equal one dotted half note. A quarter note is one beat, and a dotted half note is three beats, so there are 3 quarter notes in a dotted half note.
In music, a triplet reduces the value of the three notes by one-third, i.e., a triplet of three quarter notes in 4/4 time has a total value equal to two quarter notes.
Oh, this can be so tricky, depending on the meter of the piece in question and how complex the passage is. The quick and dirty answer is that a dotted eighth has the value of three sixteenth notes. You can see that two eighth notes would be equal to 4 sixteenth notes, right? If you pair a dotted eighth note with a sixteenth note (you will see this very often: the two notes are connected with one flag/bar, the dot comes with the first note, and there is an added flag/bar segment to the second note that is short; it doesn't extend back to the first note) then the dotted eighth takes the place of the first 3 sixteenth notes in a group of four sixteenths.